DAX If Statement

Hi Polar_A ,

If you want to add a new column to mark the data you need, then try the following expression.

Column = 
VAR MaxShipDate = CALCULATE(MAX('Table'[ShippingDate]),ALLEXCEPT('Table','Table'[RefNumber]))
RETURN
IF('Table'[Shipping Status]="Complete" && 'Table'[ShippingDate]=MaxShipDate,1)

If you want to create a new table, then try the following table expression.

Table 2 = 
FILTER(
    'Table',
    'Table'[Shipping Status]="Complete" &&
        'Table'[ShippingDate]=CALCULATE(MAX('Table'[ShippingDate]),ALLEXCEPT('Table','Table'[RefNumber]))
)

Did I answer your question? If yes, pls mark my post as a solution and appreciate your Kudos !

Thank you~

Polar_A - You can do this with a measure by using the following DAX:

Show Record = 
VAR _ref =
    SELECTEDVALUE ( 'Table (4)'[RefNumber] )
VAR _ship_status =
    SELECTEDVALUE ( 'Table (4)'[Shipping Status] )
VAR _ship_date =
    SELECTEDVALUE ( 'Table (4)'[ShippingDate] )
VAR calc =
    CALCULATE (
        MAX ( 'Table (4)'[ShippingDate] ),
        FILTER ( ALL ( 'Table (4)' ), 'Table (4)'[RefNumber] = _ref )
    )
RETURN
    SWITCH (
        TRUE (),
        _ship_status <> "Complete", 1,
        IF ( CALCULATE ( calc, 'Table (4)'[RefNumber] = _ref ) = _ship_date, 1, 0 )
    )

You can then add the measure as a filter to the visual and set the value to 1, please see the screenshot below (you do not need the measure in the table, you can just add it to the filter pane):

If this works for you, please accept it as the solution. 

Hi Polar_A 

There are many ways to achive your required output, and one of them is as follows:

I attach an example pbix file.  

Best regards,